These 42.7MM bore size manifolds are ideal for the 911 Porsche Turbo in order to enhance sound and flows; and are one of our fastest selling and most popular products, with a fantastic appearance and proven gains. With a sleek brushed finish, we are certain that you will be delighted with the result. The manifolds upgrade from the 38MM OE and are ideal as either a direct replacement or in conjunction with one of our exhaust systems for 996 or 997 Turbo. The increased bore size translates to more free-flowing engine gases, leading to performance gains in terms of both HP and Torque.
